William Monahan
- Birthday: 1960-11-03
- Place of birth: Boston, Massachusetts, USA
- Also know as: 윌리엄 모나한
William J. Monahan (born November 3, 1960) is an American screenwriter and novelist. His second produced screenplay was The Departed, a film that earned him a Writers Guild of America Award and an Academy Award for Best Adapted Screenplay. Description above from the Wikipedia article William Monahan, licensed under CC-BY-SA, full list of contributors on Wikipedia.
